<meta charset="UTF-8">
<input type="button" value="app" id="left_button"/>
<input type="button" value="order_record" id="left_button1"/>
<input type="button" value="update_order_record" id="left_button2"/>
<input type="button" value="order_record_list" id="left_button3"/>
<input type="button" value="pay" id="left_button4"/>
<input type="button" value="notify" id="left_button5"/>
